Koreatown, Manhattan, or Manhattan's Koreatown, a neighborhood in the Manhattan borough of New York City, USA, is an ethnic Korean enclave generally bordered by 31st and 36th Streets, Fifth Avenue, and the Avenue of the Americas. Its location in Midtown Manhattan is close to the Empire State Building and Macy's at Herald Square.

The Koreatown area of Manhattan is primarily a Korean business district. However, in recent years, the district has seen an increase in Korean and European traffic as well. There was never a formal plan or agreement to create a Korean commercial district in Manhattan. However, given the high tourist traffic stemming from its proximity to the Empire State Building,Garment District, Flower District, among many others, it was an ideal place to which Korean immigrants could move. Initiated by a bookstore and a handful of restaurants, Koreatown sprang into being. With their success, more and more Korean-owned businesses took root in the neighborhood, coinciding with increased immigration from Korea.

Manhattan (/mænˈhætən/) is the most densely populated and the oldest of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the U.S. state of New York. The borough and county consist of Manhattan Island and several small adjacent islands: Roosevelt Island, Randall's Island, Wards Island, Governors Island, Liberty Island, part of Ellis Island,Mill Rock, and U Thant Island; as well as Marble Hill, a very small area on the mainland bordering the Bronx. The original city of New York began at the southern end of Manhattan, expanded northward, and then between 1874 and 1898, annexed land from surrounding counties.

The New York County is the most densely populated county in the United States, and one of the most densely populated areas in the world, with a 2010 population of 1,585,873 living in a land area of 22.96 square miles (59.5 km²), or 69,464 residents per square mile (26,924/km²), more dense than any individual American city. It is also one of the wealthiest counties in the United States, with a 2005 per capita income above $100,000. Manhattan is the third-largest of New York's five boroughs in population, and its smallest borough in land area.